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HQPlayer Running DSD512/EC7v2 Stably on 12700K with Passive Cooling


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Yes both sides are warm around 45 degrees with the left hand side about 3 degrees higher. With the more efficient H5V3, you can try if heat pipes on one side can keep your box running DSD512. One thing you should try is lowering the CPU Vcore. I did more tests in longer time today and had 1 crash when the temperature was getting higher. Now I have to increase the Vcore to 1.125V. I also updated my post with the latest result.


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  • 9 months later...
On 12/28/2021 at 2:37 AM, SK8 said:

Happy to share that I managed to build a passive cooling system using  the new Intel 12700K and HDPLEX H5 Gen 2  fanless chassis and the system can run DSD512/ASDM7ECv2/poly-sinc-ext2  smoothly with HQPlayer Embedded 4.28. 


Here are my configuration details:

Intel i7 12700K

Gigabyte AORUS Z690 Ultra

Crucial 16GB DDR5 4800MHz CL40 x 1

Samsung 980PRO NVME M.2 PCIE 4.0 SSD 1TB

HDPLEX H5 Gen 2 Fanless Chassis with HDPLEX 500W LPS

Ubuntu 20.04.3 LTS (GNU/Linux 5.11.0-43-lowlatency x86_64)

HQPlayer 4 Embedded 4.28.0


As I have no plan to install a graphics card for CUDA processing, I modified the H5 to have copper heat pipes connected to the large heatsinks on both sides. An extra copper CPU heatsink with long (38 and 45mm) heat pipes are required for this modification. The biggest heatsink I could find only has 6 grooves for heat pipes (see the picture below).




With this configuration, the CPU temperature gradually increased to over 80 degrees if I do not make any change in BIOS. Then I gradually lowered the CPU V-core voltage in the BIOS from the factory default setting of 1.2V. At last, I settled at 1.115V which is the lowest stable operating voltage for my system. After more than 1 hour of running DSD512/ASDM7ECv2/poly-sinc-ext2, the CPU temperature was around 65 deg and never exceeded 70 degrees. The temperatures measured from the outside of the left and right side panels of the H5 were 46 and 42 degrees respectively.




Hope this is useful for those who are considering a new system taking advantage of the new Alder Lake CPUs.


This is pretty impressive. Have you tried poly sinc gauss long and/or poly sinc gauss hi-res lp 

No electron left behind.

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